Excerpt from Master Key to Wealth by Dr. Joseph Murphy:
"A businessman first brought to my attention the success power of the imagination. This man had gone through a period of severe financial privation and felt he could endure it no longer. Learning of the imaging power of the mind, he purchased some "play money" from the dime store and placed the bills of large denomination in his wallet. Every time he opened his wallet, his eyes would see first those large sums of money, and subconsciously the thought would register, " I have money!" It was a nice, new thought for his subconscious, which had so often been fed the idea, "I have no money."
From this point on, he began to make more money as salesman, and gradually he became quite prosperous. He feels that the turning point from financial lack to financial abundance came, the day he placed "play money" in his wallet. This helped him to begin to see plenty instead of lack. It may sound like a kindergarten idea to you, but who cares, if it works. And it does! Actually, this is an old occult secret for prosperity that was known and used by the ancients. When they desired more money, they would sit in meditation, picture definite sums of money, and then demand of universal substance, "Give me this." They would picture definite sums of money, over and over, day in and day out, until the money came to satisfy their needs in some way.